<?php

namespace PHPExcel\Writer\Excel5;

/**
 * \PHPExcel\Writer\Excel5\Font
 *
 * Copyright (c) 2006 - 2015 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * @category PHPExcel
 * @package PHPExcel_Writer_Excel5
 * @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
 * @version ##VERSION##, ##DATE##
 */
class Font {
    /**
     * Color index
     *
     * @var int
     */
    private $colorIndex;
    
    /**
     * Font
     *
     * @var \PHPExcel\Style\Font
     */
    private $font;
    
    /**
     * Constructor
     *
     * @param \PHPExcel\Style\Font $font            
     */
    public function __construct(\PHPExcel\Style\Font $font = null) {
        $this->colorIndex = 0x7FFF;
        $this->font = $font;
    }
    
    /**
     * Set the color index
     *
     * @param int $colorIndex            
     */
    public function setColorIndex($colorIndex) {
        $this->colorIndex = $colorIndex;
    }
    
    /**
     * Get font record data
     *
     * @return string
     */
    public function writeFont() {
        $font_outline = 0;
        $font_shadow = 0;
        
        $icv = $this->colorIndex; // Index to color palette
        if ($this->font->getSuperScript()) {
            $sss = 1;
        } elseif ($this->font->getSubScript()) {
            $sss = 2;
        } else {
            $sss = 0;
        }
        $bFamily = 0; // Font family
        $bCharSet = \PHPExcel\Shared\Font::getCharsetFromFontName($this->font->getName()); // Character set
        

        $record = 0x31; // Record identifier
        $reserved = 0x00; // Reserved
        $grbit = 0x00; // Font attributes
        if ($this->font->getItalic()) {
            $grbit |= 0x02;
        }
        if ($this->font->getStrikethrough()) {
            $grbit |= 0x08;
        }
        if ($font_outline) {
            $grbit |= 0x10;
        }
        if ($font_shadow) {
            $grbit |= 0x20;
        }
        
        $data = pack("vvvvvCCCC", 
                // Fontsize (in twips)
                $this->font->getSize() * 20, $grbit, 
                // Colour
                $icv, 
                // Font weight
                self::mapBold($this->font->getBold()), 
                // Superscript/Subscript
                $sss, self::mapUnderline($this->font->getUnderline()), $bFamily, $bCharSet, $reserved);
        $data .= \PHPExcel\Shared\StringHelper::UTF8toBIFF8UnicodeShort($this->font->getName());
        
        $length = strlen($data);
        $header = pack("vv", $record, $length);
        
        return ($header . $data);
    }
    
    /**
     * Map to BIFF5-BIFF8 codes for bold
     *
     * @param boolean $bold            
     * @return int
     */
    private static function mapBold($bold) {
        if ($bold) {
            return 0x2BC; // 700 = Bold font weight
        }
        return 0x190; // 400 = Normal font weight
    }
    
    /**
     * Map of BIFF2-BIFF8 codes for underline styles
     * 
     * @static array of int
     *        
     */
    private static $mapUnderline = array(
    \PHPExcel\Style\Font::UNDERLINE_NONE => 0x00,
    \PHPExcel\Style\Font::UNDERLINE_SINGLE => 0x01,
    \PHPExcel\Style\Font::UNDERLINE_DOUBLE => 0x02,
    \PHPExcel\Style\Font::UNDERLINE_SINGLEACCOUNTING => 0x21,
    \PHPExcel\Style\Font::UNDERLINE_DOUBLEACCOUNTING => 0x22 
    );
    
    /**
     * Map underline
     *
     * @param
     *            string
     * @return int
     */
    private static function mapUnderline($underline) {
        if (isset(self::$mapUnderline[$underline])) {
            return self::$mapUnderline[$underline];
        }
        return 0x00;
    }
}
